Wrench.



I 0. A. MBNTZER..

WRENCH.

APPLICATION FILED MAY 18, 1914.

1,108,602, Patented Aug. 25, 19%

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2 I i /6 B k 7 Q W l I ATTORNEY.

THE NORRIS FETERS C0,. PHOTO-LITHO.. WASHINGTON D. 9.

nurrun STATES PATENT orrron.

onrvnn A. iunivrzna, or LANCASTER, rnnnsarnvnnra, ASSIGNOR or ONE-HALFTO nnnnrn. RANSING, or rnnonsrnn, PENNSYLVANIA.

VIEENGH.

To all whom it may concern:

Be it known that I, OLIVER A. Mnnrznn, a citizen of the United States,residing at Lancaster, in the county of Lancaster and State ofPennsylvania, have invented certain new and useful Improvements inWrenches, of which the following is a specification, reference being hadtherein to the accompanying drawing.

This invention relates to a wrench which may be used for the varioususes for which a wrench is employed, but it is especially designed foruse with my improved lock bolt and nut, which is described and claimedin my application for United States patent filed December 10, 1913,Serial No. 805,670. Referring to said application, it will be noted thatin a general way the invention comprises a bolt having one or more sidesflatted, or having a keyway, and upon which a washer is placed, so thatit is non-revoluble on the bolt; one surface of said washer beingcorrugated; while upon this washer is placed a locking washer providedwith springpawls which engage the corrugations on the first washer, andhold the same against rotation in a backward direction as the lockingwasher is secured to the nut. To release the locking washer it isnecessary to raise the spring pawls from engagement with the corrugations on the washer, and at the same time back off the nut from thebolt; and to accomplish this in a sure and quick manner, I have devisedthe wrench which is the subject of this invention, and which I will nowproceed to describe in detail.

With these and other objects in view, my invention consists in certainconstruction and combination of parts as will hereinafter Specificationof Letters Patent.

Application filed May 18, 1914.

a top plan View of the same.

Patented A11 25, 1914-.

Serial No. 839,193.

Referring to the drawings :Figure 1, is a side elevation of my wrench asapplied to the nut and bolt lock. Fig. 2, is a top plan view of thesame. Fig. 3, is a side elevation of a modified form of wrench. Fig. 4:,is Fig. 5, is a side elevation of a similar device, which may beemployed when the nut is in close quarters and not sufficient roomallowed for the use of the wrench.

In the drawings, the nut is designated by the numeral 1; the corrugatedwasher by 2; the locking washer by 3; the spring pawl by 1, and thecorrugations by 19, and the bolt by 5.

As shown by Fig. 1, the wrench comprises a body portion or handle 6,which is provided at one end with a nut engaging portion grooved out asat 7 to engage the nut 1, and rest upon the upper surfaces thereof.Depending from the lower surfaces of said end and integral therewith aretwo curved arms 8, which have their ends tapered as at 9, to engage thetits on the spring pawls 4, in such a manner that when pressure isexerted on the wrench, the portion 7 acts as a lever, and the arms 8,raise the pawls 4, out of engagement with the corrugations 19; while atthe same time the nut may be turned by the wrench.

The modification shown in Figs. 3, and 2, only differs from the aboveconstruction in that the pawl lifting arms '13, are part of thebifurcated ends of a finger lever 12, which is pivoted at 1 1, upon thelever 10, and by pressing the levers 10, and 12, together, the pawls arereleased.

The modification shown in Fig. 5, comprises a yoke 17 having dependingarms 15, and pawl engaging hooks 16, while a wedge 18, is driven betweenthe yoke 17, and the head. of the bolt 5, thus raising the pawls.

Having thus described my invention what I claim as new, and desire tosecure by Letters Patent is 1. A wrench of the class described having abifurcated end adapted to engage the top and sides of the nut, andcurved arms depending therefrom and adapted to engage the nut lockingmeans and release the same.

2. In combination with a nut locking device comprising two washers, onebeing corrugated and the other provided With pawls In testimony whereofI aflix my signaengaglng the same, of a Wrench havlng an -ture 1npresence f two Witnesses.

end portion adapted to en a e the face and sides of the nut and adipznding portion OLIVER MENTZER' adapted to engage the pawls and raisethe Witnesses:

same out of engagement When pressure is JOHN J. THOMPSQN,

exerted on said Wrench. M. L. LEFEVRE.

Copies of this patent may be obtained for five cents eaeh, by addressingthe Commissioner of Patents,

- Washington, D. 0.-

